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(No Model.) 3 Sheets-Sheet 1.

VOLTAIG ARG LAMP. No. 311,142. Patented Jan. 2o, 1885.

INVENTOR.

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W. P. PATTON.

VOLTAIO ARG LAMP.

No. 311,142. Patented Jan. 20,1885.

WITNESSES.:

3 Sheets Sheet 3.

(No Model.)

W. P. PATTGN.

VOLTAIG ARG LAMP.

'110.611,142. Patented Jan. 20, 1885.

WITNESSES: 4

UNITED STATES PATENT OFFICE.

i VILLIAM I). PATTON, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR OF ON E-HALF IO lV. E. MAOHLIN, OF SAME PLACE.

VOLTAlC-ARC LAMP.

SFEGIFICATION forming part of Letters Patent No. 311,142, dated January20, 1885.

(No model.)

Z0 aZZ whom t may conceive:

Be it known that I, WILLIAM P. PAT'roN, a citizen of the United States,and a resident of Harrisburg, in the county of Dauphin and 5 State ofPennsylvania, have invented certain new and useful Improvements inVoltaic-Arc Lamps; and I do hereby declare that the following is a full,clear, and exact description of the invention,which will enable othersskilled Io in the art to which it appertains to make and use the saine,reference being had to the accompanying drawings, which form a part ofthis specification, and in which- Figure l is a side view of anelectricalarc i5 lamp embodying my improvements. Fig. 2 is a similarview illustrating the parts comprising my improvements in section. Fig.3 is a detail view of the feed-cylinder. Fig. 4 is a detail view of thefeed-screw through 2o which air is admitted to the lower end of theglobe, and Fig. 5 is aside view illustrating a modification.

The same letters refer to the same parts in all the iigures.

My invention has relation to that class of arc-lamps in which the globeis closed air-tight at both ends and provided with a closed casing forthe passage of the carbon and its holder from the feed-case; and itconsists in the 3o improved construction and combination of parts of thesame, as hereinafter more fully described and claimed.

In the drawings hereto annexed, A designates the feed-case of anordinary arcflamp. 35 Bis the upper frame-bar. O O are the sideframe-bars, and D is the bottom bar of the frame which supports theglobe. lTubes E E for the carbon-holders extend upwardly from thefeed-case A.

F designates the globe, which is preferably of aspherical shape, ornearly so, and which is provided at its lower end with an opening, G,having a flange, II, which rests upon the bottom bar, D, of the frame,between which and 45 the said flange a sheet, I, of rubber or othersuitable flexible material, is interposed in order to form an air-tightjoint.

Upon the horizontal plate J, which is mounted upon the basebar D, andwhich 5o serves to support the globe, is secured a standard, K, havingarms L, provided with sockets M, one of which serves to support thelower carbon point. In the drawings two sockets are shown, but only oneset of carbons is used, the other socket serving simply as a reservesocket in the case oian accident.

The under side of the feed-case A is provided with an opening, N,surrounded by a flange or fer-rule, O. The latter is provided with apin, I), by means of which a tube or cylinder, Q, may be detachablyconnected to the same, the said tube having an L-shaped notch, It, atits upper end, forming what is commonly termed a bayonet-j oint,7 7whereby the said tube may be detachably connected to the said flange.rIlube Q is provided about midway of its length with an opening, S,located between two annular Ilanges, which lat ter serve as guides orbearings for arevolving ring, T, having an opening, U, which may be madeto register with the perforation S, and through which admission oi' airinto the cylinder or tube may be regulated, or, if desired, entirelystopped by simply turning the ring T, which is for this purpose providedwith a handle, V.

lV and X are tubular sections teleseoping within each other and within.the upper sec tion, T. rlhese sections are provided at their upper edgeswith annular grooves or recesses, in which packing Z, of any suitablematerial, is placed.

ForI packing I prefer to use soft asbestus, 'for the reason that thismaterial is not aitected by heat, while it will readily retain oil,tallow, or other lubricating material, which is necessary in order tocause the telescopic sections to work i'reely within each other. Thelower section, X, is rigidly connected to the top or cover A of theglobe F. The said cover is concave-convex in shape, and is provided atits outer edge with two concentric annular iianges, B and O, etweenwhich a ring or washer, D, of rubber or other suitable material, isinterposed, the said washer vprojecting beyond the lower edges oi' thesaid llanges, as clearly shown in Fig. 2 of the drawings. It will thusbe seen that when the cover is lowered upon the lamp the `washer D willserve to form a joint which is absolutely air- IOO tight. The cover A'is provided with a centrally-located secke y, E', adapted to receive theshank F' of a nut, G', adjustable upon the lower end of a rod, H', whichis pivotally connected to the under side or bottom of the feedease A. ltwill be seen that by this arrangement, when the holding-nut G is screwedin an upward direction, so as to release it from the socket upon thelamp-cover, it may be swung out ofthe way, so as to enable the saidcover to be raised or lifted, this being made possible by the telescopicjoints or tubes heretofore described. lf access to the carbonholder isdesired, (the carbon-holder,which is indicated by letter l', is clearlyshown in Fig. 2 of the drawings, and it will be seen that it is providedat its lower end with a carbonclamp, J', of ordinary constructiom) itmay be had by detaching the upper telescopic tube from the flange of thefeed-box to which it is attached, and this may be done by simply turningthe said upper tube so as to release its L-shaped notch from the pin ofthe holdingflange. The lower frame-bar, B, is provided with an inclinedscrew-threaded perforation, K', in which is fitted a screw, L', one sideof which is flattened or provided with a V -shaped recess, M', asclearly shown in Fig. 2 of the drawings. This screw extends through therubber washer l, and by it the admission of air to the lower end of theglobe may bethoroughly regulated.

Frein the foregoing` description, taken in connection with the drawingshereto annexed, the operation and advantages of my invention will bereadily understood.

Vhen it is desired to renew the carbon points in the lamp, this may bedone by first releasing the nut G' from the cover and swinging the rodcarrying the said nut backward and out of t-he way. The cover of thelamp may then be raised by the hereinbefore-dcscribed arrangement of thetubular and teleseoping sections, thus affording free access to theinterior of the globe and to the upper-carbon holder.

lVhen it is desired to clean the upper-carbon holder, which isfrequently necessary in order to cause its uninterrupted operation, thismay be easily done by removing the telescopic tube, which may beaccomplished by simply turning its upper section so as to release itfrom the pin P. posed between the lower support of the lampglobe and theflange H of the same, serves to take up any expansion of the globe, soas to prevent breakage of the latter. rEhe admission of air to the globewill be regulated not only by the band or rim S upon the upper sectionof the telescopic cylinder, but also by the feed-screw L' at the bottomof the globe. I thus establish a through current of air withoutproviding an excess of oxygen, so that eX- cessive consumption of thecarbon points may be absolutely prevented simply by properly adjustingthe air entrance and cXit. It will The packing I, inter-v also be seenthat it is utterly impossible for insects or other causes of obstructionto enter the globe.

My invention, as above described, has been j shown applied only to alamp originally constructed to use two sets of carbons; but it isobvious that the invention may be equally well and successfully appliedto a single are lamp by simply making trilling modifications intheconstruction of details. One way of doing this l have illustrated inFig. 5 ot' the drawings hereto annexed, by reference to which it will beseen that the telescopic tube, which is here designated by letter A2, isconnected centrally instead of eccentrieally to the feed-case B2 andglobe-cover C2. DE is a rod hinged eccentrically to the under side ofthe feed-case, and composed of sections Ei Fl, connected by a right andleft hand nut, G2, by means of which the lower section may bc forceddown against the globe-cover, so as to retain the latter securely inposition. rlhe said lower section, F, is provided with ahori- Zontalfork, H, straddling or embracing the telescopic tube so as to bear orpress squarely upon the globe-cover. The operation ot' this modificationis obvious when reference is had to the foregoing description.

I would have it understood that in many respects this invention maybechanged or moditied without departing from the principle involved, andthat l reserve to myself the right to all such changes and modificationsas may be made without departing from the spirit of the invention.

Having thus described my invention, l claim and desire to secure byLetters Patent of the United Statesl. In an electric lamp, thecombination of a feed-case, a supporting-frame suitably conneeted to thesame, a globe suitably mounted in the said supporti11g-trame, anair-tight cover for the said globe provided with a socket upon its upperconvex side, a rod pivoted to the under side of the feed-ease and havingat its lower end a nut, the shank of which is adapted to work or slidein the socket of the air-tight cover, and a telescopic tube connectingthe said air-tight cover with a flange upon the under side ofthefeed-box, substantially as set forth.

2. ln an electric lamp, the combination, with a feed case, thesupporting-frame attached thereto, and a globe mounted in the saidsupporting-frame, of an air-tight cover for the said globe, a telescopictube connecting the said air-tight cover with a flange upon the underside of the feed-case, the upper section of the said cylinder ortelescopic jointed tube being provided with a perforation, as shown, anadjustable gate for the said perforation, and means for admittingregulated quantities of air into the bottom of the globe, substantiallyas set forth.

3. In an electric lamp, the combination, with a feed-case, of a frameattached to the same and supporting a globe an air-tight cover for thelatter, a central pivoted rod attached l to the under side of thefeed-case and connected detachably with the center of the airtight coverof the globe, and an eccentricallyarranged telescopic tube connectingthe said air-tight cover with the under side of the feedcase,substantially as set forth.

4. In an electric lamp, the combination7 with the feed-ease having aneccentricallyarranged downwardly-projecting ilange or collar, of a tubemounted detachably upon the said collar and provided with anair-admission opening and a regulating gate, additional tubesteleseoping within the said detachable tube, a globe-cover connectedpermanently and eccentrically to the lowerlnost tube7 and asuitably-arranged globe, substantially as herein set forth.

5. In anl electric lamp, the combination of a suitable feed-case, theframe attached to the same, a flanged disk arranged upon the lowerframe-bar, a flexible packingdisk arranged upon the said plate, agrooved or flattened feed-screw extending through the said plate andpackingdisk, a flanged globe mounted upon the latter, an air-tight coverfor the said globe, a central rod pivoted to the under side of thefeed-case, and having a nut whereby the said cover may be tightenedaga-inst the upper side ofthe globe, and a telescopic tube connecteddetachably to the under side ofthe feed-case, and having its lowersection connected eccentrically to the airtight cover of the globe, theupper section of the said telescopic tube being provided with anair-inlet and mechanism i'or regulating the admission ot' air,substantially as herein described, for the purpose set forlh.

In testimony that I claim the foregoing as my own invention I havehereunto at'xed iny signature in presence of' two witnesses.

XVILLIAM I?. PATTON.

W'itnesscs:

ANTHONY KING, WM. H. CLECKNER.

